Information processing apparatus that transmits a speech signal to a speech recognition server triggered by an activation word other than defined activation words, speech recognition system including the information processing apparatus, and information processing method

ABSTRACT

An information processing apparatus includes: a speech obtainer which obtains speech of a user; a first controller which, when the first controller recognizes that the speech obtained by the speech obtainer is a first activation word, outputs a speech signal corresponding to a second activation word different from the first activation word; and a second controller which performs an activation process for starting transmission of the speech signal of the speech obtained by the speech obtainer to a VPA cloud server when the second controller recognizes that the speech signal output by the first controller indicates the second activation word.

RELATED APPLICATIONS

This application is the U.S. National Phase under 35 U.S.C. § 371 ofInternational Application No. PCT/JP2018/003521, filed on Feb. 2, 2018,which in turn claims the benefit of U.S. Provisional Application No.62/540,415, filed Aug. 2, 2017, the disclosures of which areincorporated by reference herein.

TECHNICAL FIELD

The present disclosure relates to an information processing apparatusfor use in a speech recognition system.

BACKGROUND ART

What is called virtual personal assistance (VPA) services for operatingdevices by speech have started to spread. Patent Literature 1 disclosesan information processing apparatus which predicts utterance of a userwhen the apparatus detected an activation word.

CITATION LIST Patent Literature

PTL 1: Japanese Unexamined Patent Application Publication No.2017-138476

SUMMARY OF THE INVENTION Technical Problem

When speech recognition is performed by a cloud server, an activationword for starting transmission of a speech signal from an informationprocessing apparatus to the cloud server is, for example, defined inadvance by a provider of a speech recognition service using the cloudserver.

The present disclosure provides an information processing apparatuscapable of starting transmission of a speech signal to a speechrecognition server triggered by an activation word other than definedactivation words.

Solution to Problem

An information processing apparatus according to an aspect of thepresent disclosure includes: a speech obtainer which obtains speech of auser; a first controller which, when the first controller recognizesthat the speech obtained by the speech obtainer is a first activationword, outputs a speech signal corresponding to a second activation worddifferent from the first activation word; and a second controller whichperforms an activation process for starting transmission of the speechsignal of the speech obtained by the speech obtainer to a speechrecognition server when the second controller recognizes that the speechsignal output by the first controller indicates the second activationword.

For example, these general and specific aspects of the presentdisclosure may be implemented using, a system, a method, an integratedcircuit, a computer program, or a computer-readable recording mediumsuch as a CD-ROM, or any combination of, systems, methods, integratedcircuits, computer programs, or computer-readable recording media.

Advantageous Effect of Invention

The information processing apparatus according to the present disclosureis capable of starting transmission of a speech signal to a speechrecognition server triggered by an activation word other than definedactivation words.

BRIEF DESCRIPTION OF DRAWINGS

FIG. 1 is a diagram for illustrating functions of a smart speaker.

FIG. 2 is a diagram for illustrating how household electrical appliancesare controlled using the smart speaker.

FIG. 3 is a diagram indicating the relationship between services andactivation words.

FIG. 4 is a diagram for illustrating a case in which a user calls aservice using a smartphone.

FIG. 5 is a block diagram indicating a configuration of a speechrecognition system according to Embodiment 1.

FIG. 6 is a flowchart indicating operations performed by the speechrecognition system according to Embodiment 1.

FIG. 7 is a diagram indicating the relationship between services andactivation words according to Embodiment 1.

FIG. 8 is a flowchart indicating operations performed by the speechrecognition system according to Embodiment 2.

FIG. 9 is a diagram indicating the relationship between services andactivation words according to Embodiment 2.

FIG. 10 is a block diagram indicating a configuration of a speechrecognition system according to Embodiment 3.

FIG. 11 is a flowchart indicating operations performed by the speechrecognition system according to Embodiment 3.

FIG. 12 is a block diagram indicating a configuration of a speechrecognition system according to Embodiment 4.

FIG. 13 is a flowchart indicating operations performed by the speechrecognition system according to Embodiment 4.

FIG. 14 is a simple block diagram indicating a configuration of a speechrecognition system according to Embodiment 5.

FIG. 15 is a simple block diagram indicating a configuration of a speechrecognition system according to Embodiment 6.

DESCRIPTION OF EXEMPLARY EMBODIMENTS

(Underlying Knowledge Forming Basis of the Present Disclosure) What iscalled virtual personal assistance (VPA) services for operating devicesby speech have started to spread. Such services include: Alexa(registered trademark) provided by Amazon (registered trademark) in theU.S.; Google Assistant (registered trademark) provided by Google(registered trademark) in the U.S.; and Cortana (registered trademark)provided by Microsoft (registered trademark) in the U.S.

Such services have been provided firstly as applications for smartphonesand personal computers, and recently as applications for stand-aloneproducts called smart speakers. The smart speakers are speakers whichcan be operated by speech of users, and are mainly intended to receiveprovision of music streaming services. In other words, main functions ofthe smart speakers are playback of music that is provided through audiostreaming services according to speech of the users. FIG. 1 is a diagramfor illustrating functions of a smart speaker.

Main functions of smart speaker 110 are implemented as described below.A speech signal of speech of a user obtained by smart speaker 110 istransmitted to VPA cloud server 120. VPA cloud server 120 performs aspeech recognition process on the received speech signal, and transmitsa command to cloud server 131 which provides an audio streaming service.Cloud server 131 transfers music to smart speaker 110 based on thereceived command.

Such a mechanism can be applied not only to cloud server 131 whichprovides the audio streaming service but also to other cloud serversincluded in third party cloud server group 130. When a third party cloudI/F is provided to a VPA service provider by a service provider of thirdparty cloud server group 130, the user can use services that areprovided by third party cloud server group 130 through smart speaker 110in a similar manner to the case of using the services through asmartphone.

For example, by means of the user uttering “[w]hat's the weather liketoday?”, the user can receive provision of weather forecast informationfrom cloud server 132 which provides a weather forecast service.Specifically, speech like “[i]t's sunny” is output from smart speaker110. In addition, when product purchase history of the user is stored incloud server 133 which provides an e-commerce site, the user canpurchase the same one of the products by uttering “[b]uy the sameproduct” toward smart speaker 110.

Such various kinds of interactive functions through smart speaker 110can be implemented by means of a microphone of smart speaker 110installed in a home, or the like recording speech of a user, sound froma television receiver, sound from a radio, etc. and transferring them toVPA cloud server 120. VPA cloud server 120 converts a speech signal intotext using an automatic speech recognition (ASR) function, and convertsthe text into machine language using a natural language processing (NLP)function. VPA cloud server 120 further converts the machine languageinto words having meaning suitable for particular context using acontext understanding function, and lastly converts the words toinstruction details according to user information using apersonalization function. VPA cloud server 120 can call third partycloud server group 130 by transmitting such instruction details as acommand.

In addition, the use of smart speaker 110 makes it also possible tocontrol household electrical appliances in a home by the VPA of VPAcloud server 120. FIG. 2 is a diagram for illustrating how householdelectrical appliances are controlled using smart speaker 110.

As illustrated in FIG. 2, when VPA cloud server 120 is connected tohousehold electrical appliance control server 140, it is possible tocontrol, by speech, air conditioners, lights, a security system,television receivers, etc. in the home of the user.

FIG. 2 illustrates an example of air conditioner group 150 including airconditioner a to air conditioner d as control target devices. When theuser utters “[m]ake a setting because I will go out”, a speech signal ofthe speech is transmitted to VPA cloud server 120. VPA cloud server 120converts the speech signal into text by the speech recognition function,and converts the text into machine language that instructs the settingof a going out mode by the natural language processing function. Inaddition, VPA cloud server 120 converts the machine language thatinstructs the setting of the going out mode into a command of turningoff the electrical devices in the user's home by the contextunderstanding function, and converts the command into a command ofturning off four air conditioners based on user information by thepersonalization function. In this way, under the household electricalappliance control using the VPA, the four air conditioners a to d areturned off by means of the user uttering “[m]ake a setting because Iwill go out”. In other words, under the household electrical appliancecontrol using the VPA, the function exceeding the function of turningoff individual air conditioners a to d using a remote controller can beimplemented.

In the case where the user uses such a VPA by a smartphone, the user canactivate the VPA by either operating a button of the smartphone orperforming an operation such as touching an icon displayed on thesmartphone.

However, in the case where the user uses the VPA by smart speaker 119,when the user activates the VPA by operating a button of smart speaker110, the user cannot obtain the advantage of smart speaker 110 allowingthe user to perform an operation by speech without using his/her hands.For this reason, when the VPA is used through smart speaker 110, it isdesirable that the VPA be activated by speech. For example, aconceivable configuration is the one in which an activation word isdefined in advance and the VPA is activated by means of the activationword being recognized by VPA cloud server 120. The activation word maybe called a wake word, or the like.

However, in such a configuration, a speech signal always needs to betransferred to VPA cloud server 120 through a microphone of smartspeaker 110. In such circumstances, the user is concerned about leakageof his/her privacy. Accordingly, it is difficult to employ such aconfiguration with consideration of the user's privacy.

For this reason, a configuration in which speech recognition of anactivation word is performed in smart speaker 110 is employed. A speechsignal of speech obtained by the microphone of smart speaker 110 istransferred to VPA cloud server 120 after the VPA is activated. FIG. 3is a diagram indicating the relationship between services and activationwords.

As illustrated in FIG. 3, at present, the user uses activation wordsspecified by the VPA service provider both when calling VPA provisionservices (services other than household electrical appliance controlservices) such as an audio streaming service, a weather forecastservice, and an e-commerce site and when calling the householdelectrical appliance control services. Assuming that the VPA serviceprovider is company B, examples of activation words include “[c]ompanyB” and “[h]ey, company B”.

After the VPA is activated, the user can call one of the VPA provisionservices and household electrical appliance control services by utteringa function activation word and command details toward smart speaker 110.

For example, when company A which manufactures and sells air conditionergroup 150 described above provides a household electrical appliancecontrol service, the user utters “[c]ompany A” as a function activationword and “[t]urn on air conditioners” as the command details forinstructing the control targets and control details. In this way, airconditioner group 150 in the home can be controlled.

As illustrated in FIG. 4, when the user uses the smartphone,applications used to call VPA provision services and applications usedto call household electrical appliance control services are normallydifferent. FIG. 4 is a diagram for illustrating a case in which a usercalls a service using a smartphone. For this reason, the user recognizesthat the world of the VPA provision services and the world of thehousehold electrical appliance control services are different worlds,and considers that there are two different service systems.

The user who recognizes that there are two different service systems inthis way may purchase and use a VPA device such as smart speaker 110manufactured and sold by company A. The user feels like executing anapplication using a smartphone when using an activation word specifiedby the VPA service provider when calling the VPA provision service. Forthis reason, the user can perform such an operation naturally withoutfeeling strange.

However, the use of an activation word specified by the VPA serviceprovider when calling a household electrical appliance control servicemay cause the user to feel strange.

For example, when control target household electrical appliances and aVPA device are assigned with a logo of company A which is a manufacturerand seller thereof, it is unnatural for the user to utter activationwords such as “[c]ompany B” and “[h]ey, company B” specified by the VPAservice provider in order to control the household electrical appliancesof company A.

In addition, the user may misunderstand that the provider of thehousehold electrical appliance control service is not company A but theVPA service provider (that is, company B). When household electricalappliance control service is not provided due to a trouble occurred inhousehold electrical appliance control server 140, the user may thinkthe trouble is caused by a problem in the VPA service provider and takea phone call to a call center of the VPA service provider. When theactivation words specified by the VPA service provider are used in thisway, there is a problem that it is difficult for the user to find outthe service provider (that is, the responsible company).

In view of this, the inventors have arrived at the configuration ofsmart speaker 110 capable of activating a speech recognition systemusing an activation word other than activation words specified by VPAservice providers. In addition, the inventors have arrived at theconfiguration of smart speaker 110 capable of connecting to a pluralityof VPA cloud servers.

Hereinafter, embodiments are specifically described with reference tothe drawings. It is to be noted that each of the embodiments describedbelow indicates a generic or a specific example. The numerical values,shapes, materials, constituent elements, the arrangement and connectionof the constituent elements, steps, the processing order of the stepsetc. indicated in the following exemplary embodiments are mere examples,and therefore do not limit the scope of the present disclosure. Inaddition, among the constituent elements in the following embodiments,constituent elements not recited in any one of the independent claimsthat define the most generic concept are described as optionalconstituent elements.

It is to be noted that each of the drawings is a schematic diagram, andis not always precisely illustrated. In the respective drawings,substantially the same constituent elements are assigned with the samereference signs, and overlapping descriptions may be omitted orsimplified.

Embodiment 1

[Configuration]

Hereinafter, a description is given of a configuration of a speechrecognition system according to Embodiment 1. FIG. 5 is a block diagramindicating a configuration of the speech recognition system according toEmbodiment 1.

As illustrated in FIG. 5, speech recognition system 100 according toEmbodiment 1 includes smart speaker 110, VPA cloud server 120, thirdparty cloud server group 130, household electrical appliance controlserver 140, and air conditioner group 150. Smart speaker 110 and airconditioner group 150 are installed in a user's home.

In speech recognition system 100, a speech signal of speech obtained byspeech obtainer 11 of smart speaker 110 is transmitted to VPA cloudserver 120, and is subjected to a speech recognition process. It is tobe noted that the activation word described above is subjected to aspeech recognition process in smart speaker 110. Hereinafter, detaileddescriptions are given of smart speaker 110, VPA cloud server 120, andhousehold electrical appliance control server 140 which constitutespeech recognition system 100.

[Smart Speaker]

Smart speaker 110 includes, as a speech user interface, informationprocessing apparatus 10 which transmits a speech signal to VPA cloudserver 120. Information processing apparatus 10 includes speech obtainer11, first controller 12, second controller 13, communication unit 14,sound output interface 15, and storage 16.

Speech obtainer 11 obtains speech of a user. Specifically, speechobtainer 11 is a microphone.

First controller 12 is located between speech obtainer 11 and secondcontroller 13, obtains a speech signal of user's speech from speechobtainer 11, and always monitors user's speech. In other words, firstcontroller 12 is located on a speech path from speech obtainer 11 tosecond controller 13. When first controller 12 recognizes that thespeech obtained by speech obtainer 11 is a first activation word, firstcontroller 12 outputs a speech signal corresponding to a secondactivation word specified by the VPA service provider (that is, companyB). Here, the first activation word is different from the secondactivation word, and is, for example, a hardware specificationactivation word specified by a hardware provider (that is, company Athat is the manufacturer and seller of smart speaker 110).

In this way, first controller 12 converts the first activation word intothe second activation word, and outputs the second activation word tosecond controller 13. In this way, the user utters the first activationword, and even when the first activation word was obtained by speechobtainer 11, second controller 13 recognizes that the second activationword was obtained. Second controller 13 which recognizes that the secondactivation word was obtained performs an activation process for turningon the VPA function as conventionally according to a VPA softwaredevelopment kit (SDK) provided by the VPA service provider. In otherwords, according to first controller 12, it is possible to cause secondcontroller 13 to perform the activation process triggered by the firstactivation word. When the hardware specification activation word is usedas the first activation word, such a function of first controller 12 isdescribed also as a hardware specification activation word searchingfunction.

It is to be noted that, in Embodiment 1, first controller 12 outputs thespeech signal corresponding to the second activation word when firstcontroller 12 recognizes that the speech signal of the speech obtainedby speech obtainer 11 is the second activation word. In this way, secondcontroller 13 can perform the activation process irrespective of whetherthe speech obtained by speech obtainer 11 is the first activation wordor the second activation word.

First controller 12 described above is implemented as a microcomputerfor example, but may be implemented as a processor.

When second controller 13 recognizes that the speech signal output byfirst controller 12 indicates the second activation word, secondcontroller 13 performs an activation process for starting transmissionof the speech (more specifically, the speech signal of the speechobtained by speech obtainer 11) obtained by speech obtainer 11 to VPAcloud server 120. Specifically, second controller 13 executes the VPASDK stored in storage 16. Second controller 13 described above isimplemented as a microcomputer for example, but may be implemented as aprocessor.

After the VPA function is turned on, communication unit 14 transmits thespeech signal to communication unit 121 of VPA cloud server 120 undercontrol of second controller 13. Communication unit 14 is specifically acommunication module. The communication module is, in other words, acommunication circuit. Communication unit 14 may perform wiredcommunication, or wireless communication. It is to be noted that a relaydevice such as a broad band rooter and a communication network such asthe Internet which are not illustrated in the drawings are presentbetween communication unit 14 and communication unit 121.

Sound output interface 15 outputs sound under control of secondcontroller 13. Sound output interface 15 outputs, for example, musicthat is transferred from cloud server 131 that provides the audiostreaming service to communication unit 14. Sound output interface 15is, for example, a speaker.

Storage 16 is a storage device which stores a program for speechrecognition which is executed by first controller 12 to recognize thefirst activation word and the second activation word and the VPA SDKwhich is executed by second controller 13. In addition, storage 16 maystore speech data that first controller 12 reads to output the speechsignal corresponding to either the first activation word and the secondactivation word. Storage 16 may be used as a buffer memory in which thespeech obtained by speech obtainer 11 is temporarily stored as speechdata. Storage 16 is, specifically, implemented as a semiconductormemory.

[VPA Cloud Server]

VPA cloud server 120 implements either the VPA provision service orhousehold electrical appliance control service by receiving the speechsignal of the speech obtained by speech obtainer 11 after smart speaker110 is activated (after the VPA function is turned on), and performing aspeech recognition process on the received speech signal. VPA cloudserver 120 is an example of a speech recognition server. VPA cloudserver 120 includes communication unit 121, VPA controller 122, andstorage 123.

Communication unit 121 receives a speech signal that is transmitted bycommunication unit 14 of smart speaker 110. In addition, communicationunit 121 transmits a command to either third party cloud server group130 or household electrical appliance control server 140, under controlof VPA controller 122. Communication unit 121 is specifically acommunication module. The communication module is, in other words, acommunication circuit.

VPA controller 122 performs a speech recognition process on the speechsignal received by communication unit 121, and causes communication unit121 to transmit the command obtained as a result of the speechrecognition process. As described above, in the speech recognitionprocess, the following functions are used: a speech recognitionfunction, a natural language processing function, a contextunderstanding function, and a personalization function. VPA controller122 is implemented as a microcomputer for example, but may beimplemented as a processor.

Storage 123 is a storage device which stores, for example, a program forspeech recognition which is executed by VPA controller 122 to perform aspeech recognition process. In addition, third party cloud I/Fs are alsostored in storage 123. The third party cloud I/Fs are programscorresponding to various kinds of services which are provided by thirdparty cloud server group 130. Storage 123 is, specifically, implementedas a semiconductor memory.

[Household Electrical Appliance Control Server]

Household electrical appliance control server 140 receives a commandfrom VPA cloud server 120, and provides a household electrical appliancecontrol service to the user by controlling air conditioner group 150based on the received command. It is to be noted that air conditionergroup 150 is an example of a control target household electricalappliance, and a household electrical appliance other than the airconditioner may be the control target household electrical appliance.Household electrical appliance control server 140 includes communicationunit 141, household electrical appliance controller 142, and storage143.

Communication unit 141 receives a command that is transmitted bycommunication unit 121 of VPA cloud server 120. In addition,communication unit 141 transmits a control signal to air conditionergroup 150 under control of household electrical appliance controller142. Communication unit 141 is specifically a communication module. Thecommunication module is, in other words, a communication circuit.

Household electrical appliance controller 142 transmits a control signalaccording to a command received by communication unit 141 tocommunication unit 141. Household electrical appliance controller 142 isimplemented as a microcomputer for example, but may be implemented as aprocessor.

Storage 143 is a storage device which stores, for example, a controlprogram for allowing household electrical appliance controller 142 tocontrol air conditioner group 150. Storage 143 is, specifically,implemented as a semiconductor memory.

[Operations]

Next, operations performed by speech recognition system 100 aredescribed. FIG. 6 is a flowchart of the operations performed by speechrecognition system 100.

First, second controller 13 of smart speaker 110 performs aninitialization process (S11). The initialization process is performedwhen, for example, power supply to smart speaker 110 is started. Smartspeaker 110 is placed into a standby state in which the first activationword and the second activation word can be recognized though theinitialization process. It is to be noted that transmission of thespeech signal to VPA cloud server 120 is stopped in the standby state.

Next, speech obtainer 11 obtains speech of a user (S12). Firstcontroller 12 performs a speech recognition process of the speech signalof the obtained speech, and determines whether the speech obtained byspeech obtainer 11 is the first activation word (S13). As describedabove, the first activation word is, for example, a hardwarespecification activation word specified by a hardware provider (that is,company A that is the manufacturer and seller of smart speaker 110). Thefirst activation word is, for example, “[c]ompany A”.

When first controller 12 determined that the speech obtained by speechobtainer 11 is the first activation word (Yes in S13), first controller12 reads out speech data corresponding to the second activation wordstored in storage 16 in advance (S14), and outputs the speech signalcorresponding to the second activation word to second controller 13(S16). The second activation word is an activation word specified by VPAservice provider (that is, company B). The second activation word is,for example, “[c]ompany B”, “]h]ey, company B”, or the like.

When first controller 12 determined that the speech obtained by speechobtainer 11 is not the first activation word (No in S13), firstcontroller 12 determines whether the speech obtained by speech obtainer11 is the second activation word (S15).

When first controller 12 determined that the speech obtained by speechobtainer 11 is the second activation word (Yes in S15), first controller12 outputs speech signal corresponding to the second activation word tosecond controller 13 (S16). In this case, for example, first controller12 temporarily stores the speech signal of the speech obtained in StepS12 in storage 16, and outputs the stored speech signal to secondcontroller 13. However, it is to be noted that the speech datacorresponding to the second activation word stored in storage 16 inadvance may be read out as in Step S14. When first controller 12determined that the speech obtained by speech obtainer 11 is not thesecond activation word (No in S15), the standby state is continued, andspeech obtainment by speech obtainer 11 is performed (S11).

It is to be noted that, in the standby state, speech signals of speechother than the first activation word and the second activation wordobtained by speech obtainer 11 may be output to second controller 13through first controller 12, and output of the speech signals to secondcontroller 13 may be stopped by first controller 12.

When the speech signal corresponding to the second activation word isoutput by first controller 12 (S16), second controller 13 recognizesthat the speech signal is of the second activation word, and performs anactivation process (S17). The activation process is a process forstarting transmission of the speech signal of the speech obtained byspeech obtainer 11 to VPA cloud server 120. As a result, the VPAfunction is turned on.

Speech obtainer 11 continues to obtain speech after the activationprocess (S18). Second controller 13 transmits in real time the speechsignal of the speech obtained by speech obtainer 11 after the activationprocess to VPA cloud server 120 using communication unit 14 (S19).

Communication unit 121 of VPA cloud server 120 receives a speech signalfrom communication unit 14, and performs a speech recognition process onthe obtained speech signal (S20). As a result, various kinds of servicesare provided to the user according to the speech obtained in Step S18.

As described above, in speech recognition system 100, first controller12 converts the first activation word into the second activation word,and outputs the second activation word to second controller 13. In thisway, even when the user utters the first activation word and the firstactivation word was obtained by speech obtainer 11, second controller 13recognizes that the second activation word was obtained. Secondcontroller 13 which recognizes that the second activation word wasobtained is capable of performing an activation process for turning onthe VPA function according to the VPA SDK that is provided by the VPAservice provider conventionally, and turning on the VPA function. Inother words, according to first controller 12, it is possible to turn onthe VPA function triggered by the first activation word withoutmodifying the VPA SDK.

In addition, first controller 12 outputs the speech signal correspondingto the second activation word when first controller 12 recognizes thatthe speech obtained by speech obtainer 11 is the second activation word.In this way, second controller 13 can perform the activation processirrespective of whether the speech obtained by speech obtainer 11 is thefirst activation word or the second activation word, and turn on the VPAfunction. FIG. 7 is a diagram indicating the relationship betweenservices and activation words according to Embodiment 1. As illustratedin FIG. 7, in Embodiment 1, words specified by company A (that are,first activation words) are added as activation words, in addition towords (that are, second activation words) specified by the VPA serviceprovider.

In such a configuration, the user can selectively use a first activationword and a second activation word, for example, by uttering the secondactivation word when the user would like to receive a VPA provisionservice and uttering the first activation word when the user would liketo receive a household electrical appliance control service. Suchselective use is similar to selective use of applications in smartphone160 described with reference to FIG. 4, and thus is considered to beless strange to the user.

It is to be noted that such activation words may be specified by theuser. For example, the name of a pet of the user, etc. may be used asindicated in FIG. 7. In this case, storage 16 stores a speechrecognition program for setting the activation word to theuser-specified word based on speech of the user.

Embodiment 2

As illustrated in FIG. 7, for example, after a user activates smartspeaker 110 by uttering “[c]ompany A” that is a first activation word inorder to cause air conditioners to operate in a going out mode, the userutters “[c]ompany A” as a function activation word and further utters“going out mode” as command details. In other words, the user needs toutter “[c]ompany A” twice.

Here, when the first activation word is the name of a company that is amanufacturer and seller of household electrical appliances such as“[c]ompany A”, it is highly likely that a user utters a functionactivation word for receiving a household electrical appliance controlservice next to a first activation word. In such a case, when firstcontroller 12 recognizes that speech obtained by speech obtainer 11 isthe first activation word, not only a speech signal corresponding to asecond activation word but also a speech signal corresponding to afunction activation word may be further output. FIG. 8 is a flowchart ofthe operations performed by speech recognition system 100. In Embodiment2, the differences from the flowchart of FIG. 6 are mainly describedbelow, and descriptions of already described matters may be omitted.

In Embodiment 2, a function activation word may be also described as aspecification word. As described above, VPA cloud server 120 transmits acommand to another server according to the result of speech recognitionof the speech signal received from smart speaker 110 (that is,information processing apparatus 10) after an activation process. Thespecification word is a word for designating a server that is thetransmission destination of the command.

As in Embodiment 1, first controller 12 determines whether the speechobtained by speech obtainer 11 is a first activation word in Step S13(S13). When first controller 12 determined that the speech obtained byspeech obtainer 11 is the first activation word (Yes in S13), firstcontroller 12 reads out speech data corresponding to a second activationword stored in storage 16 in advance (S14). First controller 12 thenturns on a specification word transmission mode (S21). Specifically, forexample, first controller 12 sets a flag corresponding to thespecification word transmission mode in storage 16.

Subsequently, first controller 12 outputs the speech signalcorresponding to the second activation word (S16), second controller 13recognizes that the speech signal indicates the second activation wordand performs an activation process (S17).

Speech obtainer 11 continues to obtain speech after the activationprocess (S18). Here, first controller 12 determines whether thespecification word transmission mode is on (S22). Specifically, firstcontroller 12 determines whether the flag corresponding to thespecification word transmission mode is set with reference to storage16.

When first controller 12 determined that the flag corresponding to thespecification word transmission mode is on (Yes in S22), firstcontroller 12 reads out speech data corresponding to the specificationword stored in storage 16 in advance, and outputs the speech signalcorresponding to the specification word to second controller 13. Inresponse, second controller 13 causes communication unit 14 to transmitthe speech signal corresponding to the specification word to VPA cloudserver 120 (S23).

Subsequently, second controller 13 causes communication unit 14 totransmit the speech signal of the speech obtained by speech obtainer 11after the activation process (S19). When first controller 12 determinedthat the specification word transmission mode is not on (No in S22),Step S23 is omitted.

As described above, in the flowchart of FIG. 8, when first controller 12recognizes that the speech obtained by speech obtainer 11 is the firstactivation word (Yes in S13), first controller 12 outputs the speechsignal corresponding to the second activation word (S16), and furtheroutputs the speech signal corresponding to the specification word (S23).The speech signal corresponding to the specification word is outputalthough the user did not utter the specification word and speechobtainer 11 did not obtain any speech corresponding to the specificationword.

In this way, the user can omit uttering the specification word. Asillustrated in FIG. 9, when a speech signal corresponding to “[c]ompanyA” is transmitted as a specification word, the user can omit uttering“[c]ompany A”. FIG. 9 is a diagram indicating the relationship betweenservices and activation words according to Embodiment 2.

Automatic transmission of such a specification word is useful when theuser selectively uses a first activation word and a second activationword by uttering the second activation word when the user would like toreceive a VPA provision service and uttering the first activation wordwhen the user would like to receive a household electric appliancecontrol service.

It is to be noted that the specification word is, for example,“[c]ompany A” that is the same as the first activation word. In otherwords, first controller 12 outputs the speech signal corresponding tothe first activation word as the speech signal corresponding to thespecification word. However, the specification word and the firstactivation word may be different from each other. For example, based onFIG. 9, the first activation word may be “[c]ompany A”, and thespecification word may be “television receiver”.

Embodiment 3

Information processing apparatus 10 may be mounted on a householdelectrical appliance other than smart speaker 110. For example,information processing apparatus 10 may be mounted on a washing machine.FIG. 10 is a block diagram indicating a configuration of a speechrecognition system according to Embodiment 3.

As illustrated in FIG. 10, speech recognition system 100 a according toEmbodiment 3 includes washing machine 170, VPA cloud server 120,household electrical appliance control server 140, and washing machinegroup 180. Washing machine 170 is installed in a user's home, or thelike, and is included in washing machine group 180.

Washing machine 170 includes information processing apparatus 10, inaddition to washing control unit 20 for implementing a washing function.In other words, washing machine 170 is a household electrical appliancecorresponding to VPA. Washing machine 170 is, for example, a householdelectrical appliance that is manufactured and sold by company A.

For example, the user utters “[l]et me know when washing is done” afterpressing a washing start button of washing machine 170. In response,after the washing is done, an end message is transmitted to smartphone160 of the user via household electrical appliance control server 140.

In speech recognition system 100 a, it is assumed that provision ofhousehold electrical appliance control service relating to washingmachine 170 is mainly received. For this reason, speech recognitionsystem 100 a does not include any third party cloud server group 130.Accordingly, it is very unnatural to use a second activation word (forexample, “[c]ompany B” or “[h]ey, company B” that is specified by a VPAservice provider, as an activation word for activating washing machine170 manufactured and sold by company A.

For this reason, in speech recognition system 100 a, when firstcontroller 12 of information processing apparatus 10 recognizes that thespeech obtained by speech obtainer 11 is the second activation word,first controller 12 does not output a speech signal corresponding to thesecond activation word. In other words, second activation word is maskedby first controller 12. FIG. 11 is a flowchart of the operationsperformed by speech recognition system 100 a.

In the flowchart of FIG. 11, Step S15 indicated by the flowchart of FIG.6 is omitted. When it was determined that the speech obtained by speechobtainer 11 is not the first activation word in Step S13 (No in S13), astandby state is continued, and speech obtainment by speech obtainer 11is performed (S11).

In short, in speech recognition system 100 a, it is possible to turn ona VPA function by the first activation word, but it is impossible toturn on a VPA function by the second activation word. In other words, inspeech recognition system 100 a, activation words are changed from thesecond activation word specified by the VPA service provider to thefirst activation word specified by the hardware provider.

In this way, the second activation word specified by the VPA serviceprovider is not used as the activation word for activating washingmachine 170 manufactured and sold by company A, which allows the user tofeel less strange.

Embodiment 4

In Embodiments 1 to 3, information processing apparatus 10 can beconnected only to a single VPA cloud server 120. However, informationprocessing apparatus 10 may be connected to a plurality of VPA cloudservers. FIG. 12 is a block diagram indicating a configuration of speechrecognition system 100 b according to Embodiment 4.

As illustrated in FIG. 12, speech recognition system 100 b according toEmbodiment 3 includes smart speaker 110 b, VPA cloud server 120 b, VPAcloud server 120 c, third party cloud server group 130, householdelectrical appliance control server 140, and air conditioner group 150.

Smart speaker 110 b includes, as a speech user interface, informationprocessing apparatus 10 b which transmits a speech signal to VPA cloudserver 120 b and VPA cloud server 120 c. Information processingapparatus 10 b includes speech obtainer 11, first controller 12 b,second controller 13 b, communication unit 14 b, sound output interface15, and storage 16 b. Hereinafter, differences of information processingapparatus 10 b from information processing apparatus 10 are described.

It is to be noted that, in Embodiment 4, definitions of a firstactivation word and a second activation word are different from those inEmbodiments 1 to 3. In Embodiment 4, the first activation word is anactivation word for allowing smart speaker 110 b to connect to VPA cloudserver 120 b, and the second activation word is an activation word forallowing smart speaker 110 b to connect to VPA cloud server 120 c.

First controller 12 b is positioned between speech obtainer 11 andsecond controller 13 b, and always monitors user speech obtained byspeech obtainer 11. For example, when first controller 12 b recognizesthat the speech obtained by speech obtainer 11 is the first activationword, first controller 12 b outputs a speech signal corresponding to thefirst activation word to second controller 13 b. In addition, firstcontroller 12 b outputs the speech signal corresponding to the secondactivation word to second controller 13 b when first controller 12 brecognizes that the speech obtained by speech obtainer 11 is the secondactivation word. For example, first controller 12 b temporarily storesthe obtained speech in storage 16 b in advance, and outputs the storedspeech signal to second controller 13 b. First controller 12 b isimplemented as a microcomputer for example, but may be implemented as aprocessor.

When second controller 13 b recognizes that the speech signal output byfirst controller 12 b is the first activation word, second controller 13b starts a first speech transmission process for transmitting the speechsignal of the speech obtained by speech obtainer 11 to VPA cloud server120 b. Specifically, second controller 13 b executes a VPA SDK-B storedin storage 16 b. The VPA SDK-B is provided by company B which provides aspeech recognition service using VPA cloud server 120 b.

In addition, when second controller 13 b recognizes that the speechsignal output by first controller 12 b is the second activation word,second controller 13 b starts a second speech transmission process fortransmitting the speech signal obtained by speech obtainer 11 to VPAcloud server 120 c. Specifically, second controller 13 b executes a VPASDK-C stored in storage 16 b. The VPA SDK-C is provided by company Cwhich provides a speech recognition service using VPA cloud server 120c.

Second controller 13 b is implemented as a microcomputer for example,but may be implemented as a processor.

Communication unit 14 b transmits the speech signal to VPA cloud server120 b in a first speech transmission process under control of secondcontroller 13 b, and transmits the speech signal to VPA cloud server 120c in a second speech transmission process under control of secondcontroller 13 b. Communication unit 14 b is specifically a communicationmodule. The communication module is, in other words, a communicationcircuit.

Storage 16 b is a storage device which stores a speech recognitionprogram which is executed by first controller 12 b to recognize a firstactivation word and a second activation word, the VPA SDK-B and the VPASDK-C which are executed by second controller 13 b, etc. In addition,storage 16 b stores priority level information to be described later.Storage 16 b may be used as a buffer memory in which the speech signalof the speech obtained by speech obtainer 11 is temporarily stored.Storage 16 b is, specifically, implemented as a semiconductor memory.

VPA cloud server 120 b receives the speech signal of the speech obtainedby speech obtainer 11 in the first speech transmission process, andperforms a speech recognition process on the received speech signal,thereby implementing the VPA provision service. VPA cloud server 120 bis an example of a first speech recognition server. The specificconfiguration of VPA cloud server 120 b is the same as the configurationof VPA cloud server 120.

VPA cloud server 120 c receives the speech signal of the speech obtainedby speech obtainer 11 in the second speech transmission process, andperforms a speech recognition process on the received speech signal,thereby implementing the household electrical appliance control service.VPA cloud server 120 c is an example of a second speech recognitionserver. The specific configuration of VPA cloud server 120 c is the sameas the configuration of VPA cloud server 120.

In this way, in speech recognition system 100 b, smart speaker 110 b(specifically, information processing apparatus 10 b) can be connectedto two VPA cloud servers. The function of information processingapparatus 10 is also described as an activation word searching function.

In speech recognition system 100 b, when the two VPA cloud servers areused to provide mutually different services, the division of roles ofthe two VPA cloud servers is clarified. The user may utter the firstactivation word when the user would like to receive a VPA provisionservice, and may utter the second activation word when the user wouldlike to receive a household electrical appliance control service. Forthis reason, the user gets less confused about activation words.

In speech recognition system 100 b, it is considered that the usersometimes would like to switch from one of the first speech transmissionprocess and the second speech transmission process to the other whilethe one is being performed. In such a case, for example, a word forswitching between the speech transmission processes, a button forswitching between the speech transmission processes, or the like isprepared. Here, in speech recognition system 100 b, first controller 12b may control switching from one of the first speech transmissionprocess and the second speech transmission process to the otheraccording to predetermined priority levels. FIG. 13 is a flowchart ofthe operations performed by such speech recognition system 100 b.Whether to switch to the second speech transmission process while thefirst speech transmission process is being performed is determined inthe flowchart of FIG. 13, whether to switch to the first speechtransmission process while the second speech transmission process isbeing performed is determined by performing similar operations.

Second controller 13 b performs the first speech transmission process(S31). The first speech transmission process is a process in which thespeech signal of the speech obtained by speech obtainer 11 istransmitted in real time to VPA cloud server 120 b. As described above,when second controller 13 b recognizes that the speech signal output byfirst controller 12 b indicates the first activation word, secondcontroller 13 b starts the first speech transmission process.

First controller 12 b determines whether the speech signal of the speechobtained by speech obtainer 11 while the first speech transmissionprocess is being performed indicates the second activation word forcausing second controller 13 b to start the second speech transmissionprocess (S32). In the case where it was determined that the speechsignal indicates the second activation word in Step S32 (No in S33), thefirst speech transmission process is continued (S31).

In the other case where it was determined that the speech signalindicates the second activation word in Step S32 (No in S33), that is,when the speech was recognized to be the second activation word by firstcontroller 12 b, first controller 12 b performs a determination based onthe priority levels (S34).

The priority levels are stored in storage 16 b in advance as prioritylevel information. First controller 12 b refers to the priority levelinformation stored in storage 16 b in Step S34. For example, thepriority levels are defined for each VPA cloud server (that is, for eachactivation word) that is the connection destination of smart speaker 110b. In this case, first controller 12 b determines whether a firstpriority level of VPA cloud server 120 b is lower than a second prioritylevel of VPA cloud server 120 c.

When first controller 12 b determines that the priority level of VPAcloud server 120 b is lower than the priority level of VPA cloud server120 c (Yes in S34), first controller 12 b outputs a speech signalcorresponding to the second activation word to second controller 13 b(S35). Second controller 13 b recognizes the speech signal to indicatethe second activation word, stops the first speech transmission processand starts the second speech transmission process (S36). The secondspeech transmission process is a process in which the speech signal ofthe speech obtained by speech obtainer 11 is transmitted in real time toVPA cloud server 120 c.

When first controller 12 b determines that the priority level of VPAcloud server 120 b is lower than the priority level of VPA cloud server120 c (No in S34), first controller 12 b does not output a speech signalcorresponding to the second activation word to second controller 13 b.As a result, the first speech transmission process is continued (S31).

In this way, when first controller 12 b recognizes that the speechobtained by speech obtainer 11 while the first speech transmissionprocess is being performed is the second activation word, firstcontroller 12 b determines whether to output the speech signalcorresponding to the second activation word to second controller 13 baccording to the predetermined priority levels.

In this way, speech recognition system 100 b is capable of switchingfrom the first speech transmission process to the second speechtransmission process with consideration of the predetermined prioritylevels. It is to be noted that first controller 12 b may be omitted whensuch operations based on priority levels as in FIG. 13 are unnecessaryin speech recognition system 100 b. In this case, second controller 13 bobtains a speech signal directly from speech obtainer 11.

It is to be noted that priority levels may be determined for eachservice that is provided to a user. For example, priority levels may bedetermined for an audio streaming service, a weather forecast service,an e-commerce service, and a household electrical appliance controlservice.

In this case, when a first priority level of a service that is providedas a result of the first speech transmission process is lower than asecond priority level of a service that is provided as a result of thesecond speech transmission process (Yes in S34), first controller 12 boutputs a speech signal corresponding to the second activation word tosecond controller 13 b (S35). In addition, when the priority level ofthe first service is higher than the priority level of the secondservice, first controller 12 b does not output the speech signalcorresponding to the second activation word to second controller 13 b.As a result, the first speech transmission process is continued (S31).

For example, a case is conceivable in which the user would like to calla household electrical appliance control service by the second speechtransmission process and place household electrical appliances in theuser's home into a going out mode (turn off the power supplies of theappliances) while an audio streaming service is being provided as aresult of the first speech transmission process. In such a case, whenthe priority level of the audio streaming service is lower than thepriority level of the household electrical appliance control service,the user can cancel the audio streaming service and receiving provisionof the household electrical appliance control service by uttering thesecond activation word. In other words, the user can cancel the playbackof music to turn off the power supplies of the appliances, and go out.

It is to be noted that the kind of a service that is currently beingprovided can be recognized by means of, for example, communication unit14 b receiving information indicating the service details that aretransmitted from third party cloud server group 130, or the like that isthe service provider. Such information is unnecessary in the case of aVPA cloud server which provides only one kind of service.

Embodiment 5

According to information processing apparatus 10 having the activationword conversion function as described in Embodiments 1 to 3, it ispossible to use the same activation word(s) in speech recognition system100 c in which a plurality of VPA devices co-exist as illustrated inFIG. 14. FIG. 14 is a simple block diagram indicating a configuration ofspeech recognition system 100 c according to Embodiment 5.

Speech recognition system 100 c includes smart speaker 110, televisionreceiver 190, washing machine 170, VPA cloud server 120 b, VPA cloudserver 120 c, third party cloud server group 130, household electricalappliance control server 140, air conditioner group 150, householdelectrical appliance control server 200, television receiver group 210,and washing machine group 180. Smart speaker 110, television receiver190, and washing machine 170 are household electrical appliancesmanufactured and sold by company A, and are installed in a user's home.

Smart speaker 110 includes information processing apparatus 10 having anactivation word conversion function. Storage 16 of informationprocessing apparatus 10 stores a VPA SDK-B that is supplied from companyB that is a VPA service provider which provides a speech recognitionservice using VPA cloud server 120 b. In other words, smart speaker 110can be connected to VPA cloud server 120 b.

Television receiver 190 includes information processing apparatus 10having a television function and an activation word conversion function.Storage 16 of information processing apparatus 10 stores a VPA SDK-Cthat is supplied from company C that is a VPA service provider whichprovides a speech recognition service using VPA cloud server 120 c. Inshort, television receiver 190 can be connected to VPA cloud server 120c.

Washing machine 170 includes information processing apparatus 10 havinga washing function and an activation word conversion function. Storage16 of information processing apparatus 10 stores a VPA SDK-C that issupplied from company C that is a VPA service provider which provides aspeech recognition service using VPA cloud server 120 c. In short,washing machine 170 can be connected to VPA cloud server 120 c.

VPA cloud server 120 b is managed by company B, and can be connected tothird party cloud server group 130 and household electrical appliancecontrol server 140. Household electrical appliance control server 140has a function for controlling air conditioner group 150 and is managedby company A.

VPA cloud server 120 c is managed by company C, and can be connected tohousehold electrical appliance control server 140 and householdelectrical appliance control server 200. Household electrical appliancecontrol server 200 has a function for controlling television receivergroup 210 and a function for controlling washing machine group 180, andis managed by company A.

Provided that no activation word conversion functions are mounted onsmart speaker 110, television receiver 190, and washing machine 170 inspeech recognition system 100 c, the user needs to utter an activationkeyword specified by company B when turning on the VPA function of smartspeaker 110, and to utter an activation word specified by company C whenturning on the VPA functions of television receiver 190 and washingmachine 170.

On the contrary, when activation word conversion functions are mountedon smart speaker 110, television receiver 190, and washing machine 170,the user can use the same activation word for smart speaker 110,television receiver 190, and washing machine 170. The same activationword may be the activation word specified by company B, the activationword specified by company C, or an activation word other than thosespecified ones.

Embodiment 6

According to information processing apparatus 10 b having the functionfor connecting to the plurality of VPA cloud servers described inEmbodiment 4, it is possible to organize activation words in speechrecognition system 100 d in which a plurality of VPA devices co-exist asillustrated in FIG. 15. FIG. 15 is a simple block diagram indicating aconfiguration of speech recognition system 100 d according to Embodiment6.

Speech recognition system 100 d has a configuration obtainable byreplacing smart speaker 110 with smart speaker 110 b in speechrecognition system 100 c.

Smart speaker 110 b includes information processing apparatus 10 bhaving a function for connecting to a plurality of VPA cloud severs.Storage 16 b of information processing apparatus 10 b stores a VPA SDK-Band a VPA SDK-C. In short, smart speaker 110 b can be connected to VPAcloud server 120 b and VPA cloud server 120 c.

Also in speech recognition system 100 d, the user can use the sameactivation word that is either the activation word specified by companyB or the activation word specified by company C, as the activation wordfor smart speaker 110, television receiver 190, and washing machine 170.

Summary of Embodiments 1 to 6

As described above, information processing apparatus 10 includes: speechobtainer 11 which obtains speech of a user; first controller 12 which,when first controller 12 recognizes that the speech obtained by speechobtainer 11 is a first activation word, outputs a speech signalcorresponding to a second activation word different from the firstactivation word; and second controller 13 which performs an activationprocess for starting transmission of the speech signal of the speechobtained by speech obtainer 11 to VPA cloud server 120 when secondcontroller 13 recognizes that the speech signal output by firstcontroller 12 indicates the second activation word. VPA cloud server 120is an example of a speech recognition server.

Information processing apparatus 10 is capable of starting transmissionof speech to VPA cloud server 120 triggered by the first activation wordother than the second activation word specified by the VPA serviceprovider. In addition, information processing apparatus 10 is capable ofsetting the same activation word in either speech recognition system 100c or speech recognition system 100 d in which the plurality of VPAdevices co-exist as in Embodiments 5 and 6.

In addition, in Embodiment 1, when first controller 12 recognizes thatthe speech obtained by speech obtainer 11 is the second activation word,first controller 12 outputs the speech signal corresponding to thesecond activation word to second controller 13.

Information processing apparatus 10 is capable of starting transmissionof speech to VPA cloud server 120 triggered by the first activation wordother than the second activation word specified by the VPA serviceprovider.

In addition, in Embodiment 3, when first controller 12 recognizes thatthe speech obtained by speech obtainer 11 is the second activation word,first controller 12 does not output the speech signal corresponding tothe second activation word to second controller 13.

Information processing apparatus 10 is capable of activating speechrecognition system 100 a triggered only by the first activation word outof the first activation word and the second activation word.

In addition, in Embodiment 2, VPA cloud server 120 transmits a commandto another server according to a speech recognition result of the speechsignal received from information processing apparatus 10 after theactivation process. First controller 12 outputs a speech signalcorresponding to the second activation word when first controller 12recognizes that the speech obtained by speech obtainer 11 is the firstactivation word, and outputs a speech signal corresponding to aspecification word for specifying a transmission destination of thecommand to second controller 13.

In this way, the user can omit uttering the specification word.

In addition, for example, first controller 12 outputs, to secondcontroller 13, the speech signal corresponding to the first activationword as the speech signal corresponding to the specification word.

In this way, the user can designate the transmission destination of thecommand by uttering once the first activation word that should beuttered twice normally.

Furthermore, speech recognition system 100 or speech recognition system100 a includes information processing apparatus 10 and VPA cloud server120.

Either speech recognition system 100 or speech recognition system 100 ais capable of starting transmission of speech to VPA cloud server 120triggered by the first activation word other than the second activationword specified by the VPA service provider.

Furthermore, an information processing method which is executed by acomputer includes: obtaining speech of a user; when the speech obtainedis recognized to be a first activation word, outputting a speech signalcorresponding to a second activation word different from the firstactivation word; and when the speech signal output is recognized toindicate the second activation word, performing an activation processfor starting transmission of the speech signal of the speech obtained toa VPA cloud server.

Information processing method allows to start transmission of speech toVPA cloud server 120 triggered by the first activation word other thanthe second activation word specified by the VPA service provider.

Furthermore, in Embodiment 4, information processing apparatus 10 bincludes: speech obtainer 11 which obtains speech of a user; firstcontroller 12 b which, when first controller 12 b recognizes that thespeech obtained by speech obtainer 11 is a first activation word,outputs a speech signal corresponding to the first activation word; andsecond controller 13 b which starts a first speech transmission processof transmitting the speech signal of the speech obtained by speechobtainer 11 when second controller 13 b recognizes that the speechsignal output by first controller 12 b indicates the first activationword. First controller 12 b determines whether to output a speech signalcorresponding to a second activation word to second controller 13 bbased on a predetermined priority level when first controller 12 brecognizes in the first speech transmission process that the speechobtained by speech obtainer 11 is the second activation word for causingsecond controller 13 b to start a second speech transmission process,and the second speech transmission process is a process for transmittingthe speech signal of the speech obtained by speech obtainer 11 to VPAcloud server 120 c different from VPA cloud server 120 b. VPA cloudserver 120 b is an example of a first speech recognition server, and VPAcloud server 120 c is an example of a second speech recognition server.

Information processing apparatus 10 b is capable of recognizing both thefirst activation word and the second activation word, and transmittingspeech selectively to VPA cloud server 120 b and VPA cloud server 120 c.More specifically, information processing apparatus 10 b is capable ofswitching from the first speech transmission process to the secondspeech transmission process with consideration of predetermined prioritylevels.

In addition, for example, first controller 12 b determines to output thespeech signal corresponding to the second activation word to secondcontroller 13 b when a priority level of VPA cloud server 120 b is lowerthan a priority level of VPA cloud server 120 c.

Information processing apparatus 10 b is capable of switching the firstspeech transmission process to the second speech transmission process,based on the priority levels of the VPA cloud servers.

In addition, for example, first controller 12 b determines not to outputthe speech signal corresponding to the second activation word to secondcontroller 13 b when the priority level of VPA cloud server 120 b ishigher than the priority level of VPA cloud server 120 c.

Information processing apparatus 10 b is capable of continuing the firstspeech transmission process, based on the priority levels of the VPAcloud servers.

In addition, for example, first controller 12 b determines to output thespeech signal corresponding to the second activation word to secondcontroller 13 b when a priority level of a first service that isprovided as a result of the first speech transmission process is lowerthan a priority level of a second service that is provided as a resultof the second speech transmission process.

Information processing apparatus 10 b is capable of switching the firstspeech transmission process to the second speech transmission process,based on the priority levels of the services.

In addition, for example, first controller 12 b determines not to outputthe speech signal corresponding to the second activation word to secondcontroller 13 b when the priority level of the first service is higherthan the priority level of the second service.

Information processing apparatus 10 b is capable of continuing the firstspeech transmission process, based on the priority levels of theservices.

Furthermore, speech recognition system 100 b includes informationprocessing apparatus 10 b, VPA cloud server 120 b, and VPA cloud server120 c.

Speech recognition system 100 b is capable of recognizing both the firstactivation word and the second activation word, and transmitting speechselectively to VPA cloud server 120 b and VPA cloud server 120 c. Morespecifically, speech recognition system 100 b is capable of switchingfrom the first speech transmission process to the second speechtransmission process with consideration of the predetermined prioritylevels.

Furthermore, an information processing method which is executed by acomputer includes: obtaining speech of a user; when the speech obtainedwas recognized to be a first activation word, outputting a speech signalcorresponding to the first activation word; when the speech signaloutput was recognized to indicate the first activation word, starting afirst speech transmission process of transmitting a speech signal of thespeech obtained to VPA cloud server 120 b; and when the speech obtainedin the first speech transmission process was recognized to indicate thesecond activation word for starting a second speech transmissionprocess, determining whether to output a speech signal corresponding tothe second activation word based on predetermined priority levels,wherein the second speech transmission process is a process oftransmitting the speech signal of the speech obtained to VPA cloudserver 120 c different from VPA cloud server 120 b.

Information processing method enables recognition of both the firstactivation word and the second activation word, and speech transmissionselectively to VPA cloud server 120 b and VPA cloud server 120 c. Morespecifically, information processing method enables switching from thefirst speech transmission process to the second speech transmissionprocess with consideration of predetermined priority levels.

OTHER EMBODIMENTS

Although some embodiments have been described, the present disclosure isnot limited to the embodiments described above.

For example, these general and specific aspects of the presentdisclosure may be implemented using an apparatus, a system, a method, anintegrated circuit, a computer program, or a computer-readable recordingmedium such as a CD-ROM, or any combination of apparatuses, systems,methods, integrated circuits, computer programs, or computer-readablerecording media. The present disclosure may be implemented as a programfor causing a computer to execute the information processing methodaccording to any of the embodiments described above, or may beimplemented as a non-transitory computer readable recording medium inwhich the program is stored.

Alternatively in any of the embodiments, a process that is executed by aparticular processing unit may be executed by another processing unit.In addition, the order of the plurality of processes in the operationsof the speech recognition system described in each of the embodiments isan example. The order of the plurality of processes may be modified, orsome of the plurality of processes may be executed in parallel.

In any of the embodiments, each of the constituent elements such as thefirst controller and the second controller may be implemented by meansof a software program suitable for the constituent element beingexecuted. Each constituent element may be implemented by means of aprogram executor such as a CPU and a processor reading and executing thesoftware program recorded on a recording medium such as a hard disc or asemiconductor memory. The first controller and the second controller maybe implemented as a single CPU or a processor.

In addition, the constituent elements such as the first controller andthe second controller may be implemented as hardware. Specifically, theconstituent elements such as the first controller and the secondcontroller may be implemented as one or more circuits or one or moreintegrated circuits. These circuits may be configured as a singlecircuit as a whole or as separate circuits. In addition, each of thesecircuits may be a general-purpose circuit or an exclusive circuit.

In addition to the above, the present disclosure encompasses embodimentswhich are obtainable by adding various kinds of modifications that aperson skilled in the art would arrive at to any of the embodiments andembodiments which are implemented by arbitrarily combining theconstituent elements and functions in the embodiments without departingfrom the scope of the present disclosure.

INDUSTRIAL APPLICABILITY

The information processing apparatus according to the present disclosureis capable of starting transmission of a speech signal to a speechrecognition server triggered by a word other than predefined activationwords. For example, the information processing apparatus according tothe present disclosure uses the same activation word in the system inwhich VPA devices and services using VPA cloud servers co-exist. Theinformation processing apparatus according to the present disclosure iscapable of contributing to spreading of VPA devices and spreading ofservices using VPA cloud servers by reducing user inconvenience causedby co-existing activation words.

The invention claimed is:
 1. An information processing apparatus,comprising: a speech obtainer which obtains speech of a user; a firstcontroller which, when the first controller recognizes that the speechobtained by the speech obtainer is a first activation word, outputs aspeech signal corresponding to a second activation word different fromthe first activation word; and a second controller which performs anactivation process for starting transmission of the speech signal of thespeech obtained by the speech obtainer to a speech recognition serverwhen the second controller recognizes that the speech signal output bythe first controller indicates the second activation word, wherein thespeech recognition server transmits a command to another serveraccording to a speech recognition result of the speech signal receivedfrom the information processing apparatus after the activation process,and the first controller outputs a speech signal corresponding to thesecond activation word when the first controller recognizes that thespeech obtained by the speech obtainer is the first activation word, andoutputs a speech signal corresponding to a specification word forspecifying a transmission destination of the command to the secondcontroller.
 2. The information processing apparatus according to claim1, wherein when the first controller recognizes that the speech obtainedby the speech obtainer is the second activation word, the firstcontroller outputs the speech signal corresponding to the secondactivation word to the second controller.
 3. The information processingapparatus according to claim 1, wherein when the first controllerrecognizes that the speech obtained by the speech obtainer is the secondactivation word, the first controller does not output the speech signalcorresponding to the second activation word to the second controller. 4.The information processing apparatus according to claim 1, wherein thefirst controller outputs, to the second controller, the speech signalcorresponding to the first activation word as the speech signalcorresponding to the specification word.
 5. A speech recognition system,comprising: the information processing apparatus according to claim 1;and the speech recognition server.
 6. The information processingapparatus according to claim 1, wherein the speech signal correspondingto the specification word is output although the speech obtainer has notobtained any speech corresponding to the specification word.
 7. Theinformation processing apparatus according to claim 1, wherein the firstcontroller is programmed to: output the speech signal corresponding tothe second activation word in any of a first case of recognizing thatthe speech obtained by the speech obtainer is the first activation wordand a second case of recognizing that the speech obtained by the speechobtainer is the second activation word, and output, to the secondcontroller, a speech signal corresponding to a specification word forspecifying a transmission destination of a command, next to the speechsignal corresponding to the second activation word, only in the case ofthe first case among the first case and the second case.
 8. Aninformation processing method which is executed by a computer, theinformation processing method comprising: obtaining speech of a user;when the speech obtained is recognized to be a first activation word,outputting a speech signal corresponding to a second activation worddifferent from the first activation word; when the speech signal outputis recognized to indicate the second activation word, performing anactivation process for starting transmission of the speech signal of thespeech obtained to a speech recognition server; transmitting, by thespeech recognition server, a command to another server according to aspeech recognition result of the speech signal received after theactivation process; and outputting a speech signal corresponding to thesecond activation word when the speech obtained is recognized as thefirst activation word, and outputting a speech signal corresponding to aspecification word for specifying a transmission destination of thecommand.
 9. An information processing apparatus, comprising: a speechobtainer which obtains speech of a user; a first controller which, whenthe first controller recognizes that the speech obtained by the speechobtainer is a first activation word, outputs a speech signalcorresponding to a second activation word different from the firstactivation word; and a second controller which performs an activationprocess for starting transmission of the speech signal of the speechobtained by the speech obtainer to a speech recognition server when thesecond controller recognizes that the speech signal output by the firstcontroller indicates the second activation word, wherein the speechrecognition server transmits a command to another server according to aspeech recognition result of the speech signal received from theinformation processing apparatus after the activation process, and thefirst controller is programmed to: output the speech signalcorresponding to the second activation word in any of a first case ofrecognizing that the speech obtained by the speech obtainer is the firstactivation word and a second case of recognizing that the speechobtained by the speech obtainer is the second activation word, andoutput, to the second controller, a speech signal corresponding to aspecification word for specifying a transmission destination of acommand, next to the speech signal corresponding to the secondactivation word, only in the case of the first case among the first caseand the second case.